WO2016129895A1 - Micro-organisme de recombinaison pour la production de diols - Google Patents

Micro-organisme de recombinaison pour la production de diols Download PDF

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WO2016129895A1
WO2016129895A1 PCT/KR2016/001309 KR2016001309W WO2016129895A1 WO 2016129895 A1 WO2016129895 A1 WO 2016129895A1 KR 2016001309 W KR2016001309 W KR 2016001309W WO 2016129895 A1 WO2016129895 A1 WO 2016129895A1
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diol
succinate
production
converting
recombinant microorganism
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Korean (ko)
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박종명
라트나싱첼라두라이
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GS Caltex Corp
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GS Caltex Corp
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Priority to EP16749435.0A priority patent/EP3257945B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/74—Vectors or expression systems specially adapted for prokaryotic hosts other than E. coli, e.g. Lactobacillus, Micromonospora
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P7/00—Preparation of oxygen-containing organic compounds
    • C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
    • C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/10—Processes for the isolation, preparation or purification of DNA or RNA
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/10—Processes for the isolation, preparation or purification of DNA or RNA
    • C12N15/102—Mutagenizing nucleic acids
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
    • C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
    • C12N9/0004—Oxidoreductases (1.)
    • C12N9/0006—Oxidoreductases (1.) acting on CH-OH groups as donors (1.1)
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P7/00—Preparation of oxygen-containing organic compounds
    • C12P7/02—Preparation of oxygen-containing organic compounds containing a hydroxy group
    • C12P7/04—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic
    • C12P7/18—Preparation of oxygen-containing organic compounds containing a hydroxy group acyclic polyhydric

Definitions

  • the present invention relates to a recombinant microorganism for diol production.
  • 2,3-butanediol which has four carbons and two hydroxy groups (-OH), is a major raw material for synthetic rubber, 1,3-butadiene and a solvent, methyl It is an industrially high potential chemical that can be used as a precursor of ethyl ethyl ketone (MEK).
  • MEK ethyl ethyl ketone
  • 2,3-butanediol has a very low freezing point, which can be directly used as an antifreezing agent, and has a high octane number, which can be used as an octane booster by mixing with gasoline.
  • 1,3-propanediol having three carbons and two hydroxy groups can be used as a monomer of a polymer such as polyester or polyurethane, and is also used for improving properties of cosmetics and personal care products. It can be used as an additive.
  • polytrimethylene terephthalate PTT
  • PTT polytrimethylene terephthalate
  • the unique twist, called) is present on the polymer chain, and thus has excellent semi-elasticity and morphological stability, and its structural properties make it applicable to a wide variety of fields such as fibers, packaging and films, nonwoven structures, and engineering plastics.
  • the diols may be produced through chemical synthesis or microbial fermentation.
  • the chemical synthesis process has a problem that environmental pollutants are generated during the process or the synthesis cost is high.
  • the production of diols (2,3-butanediol, 1,3-propanediol) through the microbial fermentation process is not only diol in the fermentation broth, but also succinate (acetic acid), acetate (acetate, etc.) Since these are produced together, there is a problem that their separation and recovery costs increase.
  • the present inventors completed the present invention by preparing recombinant microorganisms having high diol production ability and low succinate and acetate production ability while studying recombinant microorganisms having high diol production ability at an industrially usable level.
  • An object of the present invention is to provide a recombinant microorganism for producing diol having high diol production capacity and low byproduct production capacity.
  • the present invention is a microorganism having a diol biosynthesis pathway, a path for converting pyruvate to lactate and a path for converting oxaloacetate to succinate is suppressed.
  • a recombinant microorganism Provide a recombinant microorganism.
  • the present invention also provides a method for producing a diol using the recombinant microorganism.
  • Recombinant microorganism of the present invention has the advantage of high production of diol, as well as low byproduct production capacity, easy production and recovery of diol.
  • Figure 2 shows the diol production capacity and cell concentration (OD600 value) of Kp wt.
  • Figure 3 shows the by-product production capacity of the fermentation broth of Kp wt.
  • Figure 4 shows the diol production capacity and cell concentration (OD600 value) of Kp ⁇ ldhA.
  • Figure 5 shows the byproduct production capacity in the fermentation broth of Kp ⁇ ldhA.
  • Figure 6 shows the diol production capacity and cell concentration (OD600 value) of Kp ⁇ ldhA ⁇ mdh.
  • Figure 7 shows the by-product productivity in the fermentation broth of Kp ⁇ ldhA ⁇ mdh.
  • Figure 8 shows the diol production capacity and cell concentration (OD600 value) of Kp ⁇ ldhA ⁇ fumA.
  • Figure 9 shows the by-product production capacity in the fermentation broth of Kp ⁇ ldhA ⁇ fumA.
  • Figure 11 shows the succinate production capacity of the strains over time.
  • the present invention is a.
  • It relates to a recombinant microorganism for diol production, characterized in that the pathway for converting pyruvate to lactate and the pathway for converting oxaloacetate to succinate are inhibited.
  • the present invention is a.
  • It relates to a recombinant microorganism for diol production, characterized in that the pathway for converting pyruvate to lactate and the pathway for converting oxaloacetate to succinate are inhibited.
  • the microorganism of the present invention has a diol biosynthetic pathway.
  • the microorganism may be any microorganism having the diol biosynthetic pathway described above, and is not particularly limited.
  • the diol biosynthesis route means a route through which diol is synthesized from a specific metabolite in a microorganism.
  • the diol biosynthesis route of the present invention may be a route for synthesizing 2,3 butanediol from pyruvate and / or a route for synthesizing 1,3 propanediol from glycerol.
  • the microorganism of the present invention has a route for biosynthesizing diol from a carbon source such as glycerol.
  • the microorganism of the present invention may be a microorganism having a diol biosynthetic pathway as a wild type or a recombinant microorganism possessed by genetic recombination.
  • the microorganism is a microorganism having the ability to produce 1,3-propanediol and / or 2,3 butanediol.
  • the microorganism may be selected from the group consisting of the genus Klebsiella, the genus Enterobacter and the genus Lactobacillus, preferably the genus Klebsiella, and more preferably the genus Klebsiella pneumoniae. Aida.
  • Lactate dehydrogenase regulates the conversion of pyruvate to lactate.
  • the pathway for converting pyruvate to lactate can be inhibited.
  • Inhibition of the lactate dehydrogenase may be achieved by inhibition of lactate dehydrogenase expression, inhibition of lactate dehydrogenase activity, and the like. For example, it may be possible to delete ldhA, a gene encoding lactate dehydrogenase, or to cause mutations (mutations such as mutation, substitution or deletion of some bases or introduction of some bases to suppress the expression of normal genes).
  • Those skilled in the art such as regulating gene expression during transcription or translation, may choose appropriate methods to inhibit lactate dehydrogenase.
  • Microorganisms having a pyruvate biosynthetic pathway of the present invention have a pathway for converting oxaloacetate to succinate.
  • the route for converting the oxaloacetate to succinate is preferably a route for converting the oxaloacetate to succinate via maleate and fumarate.
  • the inhibition of the pathway for converting the oxaloacetate to succinate is performed by suppressing the pathway for converting oxaloacetate to maleate or the pathway for converting maleate to fumarate, more preferably maleate di Inhibition of hydrogenase or fumalase inhibits the pathway to convert the oxaloacetate to succinate. Even more preferably, to delete the mdh or fumA (or fumABC) gene or to cause mutations in the gene (mutations such as mutation, substitution or deletion of some bases or introduction of some bases to inhibit the expression of normal genes), By controlling gene expression during transcription or translation, the pathway for converting the oxaloacetate to succinate is inhibited.
  • the mdh gene is a nucleotide sequence having at least 80% homology with SEQ ID NO: 9, preferably a nucleotide sequence having at least 85% homology, more preferably a nucleotide sequence having at least 90% homology, even more preferred.
  • the nucleotide sequence has a homology of 95% or more.
  • the fumA gene is a nucleotide sequence having at least 80% homology with SEQ ID NO: 17, preferably a nucleotide sequence having at least 85% homology, more preferably a nucleotide sequence having at least 90% homology, even more preferred.
  • the nucleotide sequence has a homology of 95% or more.
  • the recombinant microorganism of the present invention is a recombinant microorganism for diol production.
  • the diol is preferably a diol having 5 or less carbon atoms, more preferably 1.3-propanediol or 2,3-butanediol. Even more preferably, the recombinant microorganism of the present invention produces 1,3-propanediol and 2,3-butanediol in a high proportion among fermentation products.
  • Recombinant microorganism of the present invention is the productivity of the diol (unit time, amount of diol produced per unit volume), production capacity (amount of diol produced per unit volume, i.e. concentration of diol in fermentation broth), yield (carbon source).
  • the amount of diol compared to the amount) is high, and in particular, the recombinant microorganism is characterized by a higher concentration of diol in the fermentation broth than the wild type microorganism during fermentation.
  • the recombinant microorganism of the present invention is characterized in that the production of oxidation byproducts such as lactate, succinate, acetate and the like is suppressed.
  • the recombinant microorganism of the present invention has increased diol productivity and suppressed succinate (ie succinic acid) production ability or acetate (ie acetic acid) productivity as compared to wild type microorganisms. More preferably, the recombinant microorganism of the present invention has a diol productivity of 15 times or more of succinate productivity, and more preferably a diol productivity of 18 times or more of succinate productivity.
  • diol productivity is 80 times or more, preferably 90 times or more, more preferably 90 times of succinate productivity. 100 times higher
  • the recombinant microorganism of the present invention inhibits the route for converting pyruvate to lactate, and the route for converting oxaloacetate to succinate inhibits the ethanol production capacity or the succinate production capacity as compared to the recombinant microorganism not inhibited. It is.
  • the present invention relates to a method for producing a diol, comprising culturing the recombinant microorganism for producing a diol of the present invention; and recovering the diol from the culture.
  • the culturing is carried out in aerobic conditions, preferably in a microaerobic condition.
  • the culturing is carried out while supplying oxygen, that is, air at the time of culturing, and as a specific example, this may be performed through stirring, but is not limited thereto.
  • Klebsiella pneumoniae GSC123 (KCTC12133BP) was used.
  • the metabolite production capacity of the microorganism in the present invention was calculated as follows.
  • Klebsiella pneumoniae GSC123 ⁇ ldhA (Kp ⁇ ldhA) strains lacking lactate dehydrogenase (ldhA) were prepared by the following method.
  • homologous region 1 (SEQ ID NO: 2) of ldhA (SEQ ID NO: 1) was amplified by PCR using primers of SEQ ID NOs: 3 and 4. It was.
  • homologous region 2 (SEQ ID NO: 5) was also amplified by PCR using primers of SEQ ID NOs: 6 and 7. Thereafter, homologous sites 1 and 2 were simultaneously amplified by PCR to complete DNA fragments (SEQ ID NO: 8) in which homologous sites 1 and 2 were conjugated (Table 1).
  • the completed DNA fragment may include an antibiotic resistance gene, and the like, and may include a sacB gene encoding a levansukraase enzyme to remove the antibiotic resistance gene recombined in the chromosome. .
  • the prepared DNA fragments were transferred to Klebsiella pneumoniae wild type (ie Klebsiella pneumoniae GSC123 (KCTC12133BP)) using electroporation (25 uF, 200 ⁇ , 18 kV / cm). Therefore, the target gene is removed by using a homologous recombination mechanism owned by the microorganism.
  • Klebsiella pneumoniae GSC123 ⁇ ldhA ⁇ mdh (Kp ⁇ ldhA ⁇ mdh) strains further deleted with malate dehydrogenase (mdh) were prepared by the following method.
  • homologous region 1 (SEQ ID NO: 10) of mdh (SEQ ID NO: 9), a target gene was subjected to PCR using primers of SEQ ID NOs: 11 and 12. Amplified.
  • Homologous region 2 (SEQ ID NO: 13) was also amplified by PCR using the primers of SEQ ID NOs: 14 and 15. Thereafter, homologous regions 1 and 2 were simultaneously amplified by PCR to complete DNA fragments (SEQ ID NO: 16) in which homologous regions 1 and 2 were conjugated (Table 2).
  • the completed DNA fragment may include an antibiotic resistance gene, and the like, and may include a sacB gene encoding a levansukraase enzyme to remove the antibiotic resistance gene recombined in the chromosome. .
  • the DNA fragments prepared were Klebsiella pneumoniae GSC123 ⁇ ldhA (Kp ⁇ ldhA) in which lactate dehydrogenase (ldhA) was deleted by electroporation (25 uF, 200 ⁇ , 18 kV / cm). ) To the strain, and the target gene is removed using the homologous recombination mechanism owned by the microorganism.
  • Klebsiella pneumoniae GSC123 ⁇ ldhA ⁇ fumA (Kp ⁇ ldhA ⁇ fumA) strains additionally deleted fumarase (fumA) were prepared by the following method.
  • homologous region 1 (SEQ ID NO: 18) of the target gene fumA (SEQ ID NO: 17) was amplified by PCR using primers of SEQ ID NOs: 19 and 20 to clone the fumarase of Klebsiella pneumoniae.
  • Homologous region 2 (SEQ ID NO: 21) was also amplified by PCR using the primers of SEQ ID NOs: 22 and 23. Thereafter, homologous regions 1 and 2 were simultaneously amplified by PCR to complete DNA fragments (SEQ ID NO: 24) in which homologous regions 1 and 2 were conjugated (Table 3).
  • the completed DNA fragment may include an antibiotic resistance gene, and the like, and may include a sacB gene encoding a levansukraase enzyme to remove the antibiotic resistance gene recombined in the chromosome. .
  • the DNA fragments prepared were Klebsiella pneumoniae GSC123 ⁇ ldhA (Kp ⁇ ldhA) in which lactate dehydrogenase (ldhA) was deleted by electroporation (25 uF, 200 ⁇ , 18 kV / cm). ) To the strain, and the target gene is removed using the homologous recombination mechanism owned by the microorganism.
  • Diols were produced by culturing the recombinant strains prepared in Experimental Example 1. At this time, wild type Klebsiella pneumoniae GSC123 (Kp wt) was used as a comparative example.
  • Each recombinant strain was inoculated in 300 ml of mixed medium and incubated at 37 ° C. for 16 hours, and then the culture solution was fermented by inoculating in 3 L complex medium.
  • the fermentation conditions are micro-aerobic condition (aerobic rate 0.5 vvm, stirring speed 300 rpm), 20 g / L glycerol at the start, 30 g / L glycerol at the feeding, pH 6.0, culture temperature 37 °C It was.
  • Ammonia water (NH 4 OH) was used to adjust the pH during fermentation.
  • the recombinant Klebsiella was sampled during fermentation, the growth rate was measured by measuring the optical density (OD600) of the collected sample, the sample was centrifuged at 13,000 rpm for 10 minutes, and then the supernatant Metabolite concentrations were analyzed by liquid chromatography (HPLC).
  • FIG. 5 shows the diol production capacity and cell concentration (OD 600 value) of ⁇ ldhA
  • Figure 5 shows the by-product production capacity in the fermentation broth
  • Figure 6 shows the diol production capacity and cell concentration (OD 600 value) of Kp ⁇ ldhA ⁇ mdh
  • Fig. 8 shows the diol production capacity and cell concentration (OD600 value) of Kp ⁇ ldhA ⁇ fumA
  • Fig. 9 shows the byproduct production capacity in the fermentation broth.
  • Performance FIG. 11 Represents hourly succinate production capacity).
  • the present invention is directed to recombinant microorganisms having high diol production capabilities at industrially available levels.
  • SEQ ID NO: 1 shows a base sequence of ldhA, a gene of lactate dehydrogenase.
  • SEQ ID NO: 2 is a nucleotide sequence of homology region 1 of ldhA.
  • SEQ ID NO: 3 Primer for PCR amplification of homology region 1 of ldhA.
  • SEQ ID NO: 4 Primer for PCR amplification of homology region 1 of ldhA.
  • SEQ ID NO: 5 shows a base sequence of homology 2 of ldhA.
  • SEQ ID NO: 6 Primer for PCR amplification of homology region 2 of ldhA.
  • SEQ ID NO: 7 Primer for PCR amplification of homology region 2 of ldhA.
  • Homologous regions 1 and 2 are DNA fragments each prepared by amplification by PCR using homologous regions 1 and 2 of SEQ ID NO: ldhA as templates at the same time.
  • SEQ ID NO: 9 shows the base sequence of mdh, a gene for malate dehydrogenase.
  • SEQ ID NO: 10 shows nucleotide sequence of homology region 1 of mdh.
  • SEQ ID NO: 11 Primer for PCR amplification of homology region 1 of mdh.
  • SEQ ID NO: 12 is a primer for PCR amplification of homology region 1 of mdh.
  • SEQ ID NO: 13 shows a base sequence of homology 2 of mdh.
  • SEQ ID NO: 14 is a primer for PCR amplification of homology region 2 of mdh.
  • SEQ ID NO: 15 is a primer for PCR amplification of homology region 2 of mdh.
  • Homologous regions 1 and 2 are DNA fragments obtained by amplifying by PCR using homologous regions 1 and 2 of SEQ ID NO: 16: mdh simultaneously as templates.
  • SEQ ID NO: 17 shows a nucleotide sequence of fumA, a gene of fumarase.
  • SEQ ID NO: 18 shows a base sequence of homology region 1 of fumA.
  • SEQ ID NO: 19 is a primer for PCR amplification of homology region 1 of fumA.
  • SEQ ID NO: 20 is a primer for PCR amplification of homology region 1 of fumA.
  • SEQ ID NO: 21 shows a base sequence of a homology region 2 of fumA.
  • SEQ ID NO: 22 is a primer for PCR amplification of homology region 2 of fumA.
  • SEQ ID NO: 23 Primer for PCR amplification of homology region 2 of fumA.
  • SEQ ID NO: 24 is a DNA fragment conjugated with homologous regions 1 and 2 prepared by amplification by PCR using homologous regions 1 and 2 of fumA simultaneously as templates.

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Abstract

La présente invention concerne un micro-organisme de recombinaison pour la production de diols, caractérisée en ce que dans un micro-organisme présentant une voie de biosynthèse de diols, une voie pour convertir le pyruvate en lactate et une voie pour convertir l'oxaloacétate en succinate sont supprimées.
PCT/KR2016/001309 2015-02-09 2016-02-05 Micro-organisme de recombinaison pour la production de diols Ceased WO2016129895A1 (fr)

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CN201680009583.1A CN107810266B (zh) 2015-02-09 2016-02-05 二醇生成用重组微生物
EP16749435.0A EP3257945B1 (fr) 2015-02-09 2016-02-05 Micro-organisme de recombinaison pour la production de diols

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KR10-2015-0019347 2015-02-09
KR1020150019347A KR101748930B1 (ko) 2015-02-09 2015-02-09 다이올 생산용 재조합 미생물

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KR102602060B1 (ko) * 2021-04-02 2023-11-14 지에스칼텍스 주식회사 부산물 생성이 저감된 2,3-부탄다이올 생산용 재조합 미생물 및 이를 이용한 2,3-부탄다이올 생산방법
KR102790431B1 (ko) * 2021-09-13 2025-04-07 지에스칼텍스 주식회사 폴리올 또는 점액성 고분자의 생성능이 조절된 재조합 미생물
KR20250161102A (ko) * 2024-05-07 2025-11-17 지에스칼텍스 주식회사 글리세롤 활용능이 개선된 재조합 미생물 및 이를 이용한 글리세롤 활용 방법

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EP3257945B1 (fr) 2019-08-28
EP3257945A1 (fr) 2017-12-20
KR20160098561A (ko) 2016-08-19
CN107810266B (zh) 2021-04-30

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